Casey Neistat admits that the logistics of running a business isn’t his speciality. Instead, he shared with Denver Startup Week audiences how he went from high school dropout to an HBO show, a New York Times partnership and later, an app that got started while on a fellowship at the Massachusetts Institute of Technology.

Twitter is defending its decision not to remove a controversial tweet by President Donald Trump on Saturday that targeted North Korea, in a six-tweet response to critics who argued that Trump violated the platform’s rules.